diff --git a/build.sh b/build.sh
index cd089f6..09cfad3 100755
--- a/build.sh
+++ b/build.sh
@@ -8,4 +8,4 @@ VAR_SETTING=""
 VAR_SETTING="$VAR_SETTING -X $PACKAGE_NAME/constant.Version=$VERSION"
 VAR_SETTING="$VAR_SETTING -X $PACKAGE_NAME/constant.Commit=$COMMIT"
 
-CGO_ENABLE=0 go build -tags "full" -ldflags="-s -w $VAR_SETTING"
+CGO_ENABLED=0 go build -tags "full" -ldflags="-s -w $VAR_SETTING"
diff --git a/docs/content/developer/overview.md b/docs/content/developer/overview.md
index 57cf13d..c57c9b3 100644
--- a/docs/content/developer/overview.md
+++ b/docs/content/developer/overview.md
@@ -114,10 +114,10 @@ Trojan-Go将所有协议（包括路由功能等）抽象为隧道(tunnel.Tunnel
       - websocket
         - trojan（终端节点）
           - mux
-          - simplesocks （终端节点）
+            - simplesocks （终端节点）
       - trojan 能够识别mux和普通trojan流量并分发（终端节点）
         - mux
-        - simplesocks （终端节点）
+          - simplesocks （终端节点）
 
 - 出站（列表）
   - freedom
diff --git a/example/trojan-go.service b/example/trojan-go.service
index bf70dd0..19380a2 100644
--- a/example/trojan-go.service
+++ b/example/trojan-go.service
@@ -1,6 +1,6 @@
 [Unit]
 Description=Trojan-Go - An unidentifiable mechanism that helps you bypass GFW
-Documentation=https://github.com/p4gefau1t/trojan-go
+Documentation=https://p4gefau1t.github.io/trojan-go/
 After=network.target network-online.target nss-lookup.target mysql.service mariadb.service mysqld.service
 Wants=network-online.target
 
diff --git a/example/trojan-go@.service b/example/trojan-go@.service
index 01789b0..91a8d46 100644
--- a/example/trojan-go@.service
+++ b/example/trojan-go@.service
@@ -6,7 +6,7 @@ After=network.target network-online.target nss-lookup.target mysql.service maria
 [Service]
 Type=simple
 StandardError=journal
-User=nobody
+User=root
 AmbientCapabilities=CAP_NET_BIND_SERVICE
 ExecStart=/usr/bin/trojan-go -config /etc/trojan-go/%i.json
 ExecReload=/bin/kill -HUP $MAINPID
diff --git a/option/option.go b/option/option.go
index 3e39356..cc867c2 100644
--- a/option/option.go
+++ b/option/option.go
@@ -22,7 +22,7 @@ func PopOptionHandler() (Handler, error) {
 		}
 	}
 	if maxHandler == nil {
-		return nil, common.NewError("No option left")
+		return nil, common.NewError("no option left")
 	}
 	delete(handlers, maxHandler.Name())
 	return maxHandler, nil
diff --git a/proxy/custom/custom.go b/proxy/custom/custom.go
index 559e61e..200a1a3 100644
--- a/proxy/custom/custom.go
+++ b/proxy/custom/custom.go
@@ -45,26 +45,27 @@ func init() {
 		var root *proxy.Node
 		// build server tree
 		for _, path := range cfg.Inbound.Path {
-			lastNode := root
+			var lastNode *proxy.Node
 			for _, tag := range path {
 				if _, found := nodes[tag]; !found {
 					return nil, common.NewError("invalid node tag: " + tag)
 				}
 				if lastNode == nil {
-					if root != nil {
-						panic("root != nil")
+					if root == nil {
+						lastNode = nodes[tag]
+						root = lastNode
+						t, err := tunnel.GetTunnel(root.Name)
+						if err != nil {
+							return nil, common.NewError("failed to find root tunnel").Base(err)
+						}
+						s, err := t.NewServer(root.Context, nil)
+						if err != nil {
+							return nil, common.NewError("failed to init root server").Base(err)
+						}
+						root.Server = s
+					} else {
+						lastNode = root
 					}
-					lastNode = nodes[tag]
-					root = lastNode
-					t, err := tunnel.GetTunnel(root.Name)
-					if err != nil {
-						return nil, common.NewError("failed to find root tunnel").Base(err)
-					}
-					s, err := t.NewServer(root.Context, nil)
-					if err != nil {
-						return nil, common.NewError("failed to init root server").Base(err)
-					}
-					root.Server = s
 				} else {
 					lastNode = lastNode.LinkNextNode(nodes[tag])
 				}
diff --git a/test/scenario/custom_test.go b/test/scenario/custom_test.go
index 8075689..a4f41cd 100644
--- a/test/scenario/custom_test.go
+++ b/test/scenario/custom_test.go
@@ -85,11 +85,24 @@ inbound:
         password:
           - 12345678
 
+    - protocol: mux
+      tag: mux
+
+    - protocol: simplesocks
+      tag: simplesocks
+     
+
   path:
     - 
       - transport
       - tls
       - trojan
+    - 
+      - transport
+      - tls
+      - trojan
+      - mux
+      - simplesocks
 
 outbound:
   node:
diff --git a/tunnel/freedom/client.go b/tunnel/freedom/client.go
index 4bc08b7..606e2e6 100644
--- a/tunnel/freedom/client.go
+++ b/tunnel/freedom/client.go
@@ -20,6 +20,7 @@ type Client struct {
 	keepAlive    bool
 	dns          []string
 	ctx          context.Context
+	cancel       context.CancelFunc
 	forwardProxy bool
 	proxyAddr    *tunnel.Address
 	username     string
@@ -116,8 +117,8 @@ func (c *Client) DialConn(addr *tunnel.Address, t tunnel.Tunnel) (tunnel.Conn, e
 			Conn: socksConn,
 		}, nil
 	}
-
-	tcpConn, err := net.Dial(network, addr.String())
+	dialer := new(net.Dialer)
+	tcpConn, err := dialer.DialContext(c.ctx, network, addr.String())
 	if err != nil {
 		return nil, err
 	}
@@ -144,15 +145,19 @@ func (c *Client) DialPacket(tunnel.Tunnel) (tunnel.PacketConn, error) {
 }
 
 func (c *Client) Close() error {
+	c.cancel()
 	return nil
 }
 
-func NewClient(ctx context.Context, client tunnel.Client) (*Client, error) {
+func NewClient(ctx context.Context, _ tunnel.Client) (*Client, error) {
 	// TODO implement dns
 	// TODO socks5 udp
 	cfg := config.FromContext(ctx, Name).(*Config)
 	addr := tunnel.NewAddressFromHostPort("tcp", cfg.ForwardProxy.ProxyHost, cfg.ForwardProxy.ProxyPort)
+	ctx, cancel := context.WithCancel(ctx)
 	return &Client{
+		ctx:          ctx,
+		cancel:       cancel,
 		dns:          cfg.DNS,
 		noDelay:      cfg.TCP.NoDelay,
 		keepAlive:    cfg.TCP.KeepAlive,
diff --git a/tunnel/freedom/freedom_test.go b/tunnel/freedom/freedom_test.go
index 1139117..38d08f3 100644
--- a/tunnel/freedom/freedom_test.go
+++ b/tunnel/freedom/freedom_test.go
@@ -2,6 +2,7 @@ package freedom
 
 import (
 	"bytes"
+	"context"
 	"testing"
 
 	"github.com/p4gefau1t/trojan-go/test/util"
@@ -11,7 +12,11 @@ import (
 )
 
 func TestConn(t *testing.T) {
-	client := &Client{}
+	ctx, cancel := context.WithCancel(context.Background())
+	client := &Client{
+		ctx:    ctx,
+		cancel: cancel,
+	}
 	addr, err := tunnel.NewAddressFromAddr("tcp", util.EchoAddr)
 	common.Must(err)
 	conn1, err := client.DialConn(addr, nil)
@@ -26,10 +31,15 @@ func TestConn(t *testing.T) {
 	if !bytes.Equal(sendBuf, recvBuf[:]) {
 		t.Fail()
 	}
+	client.Close()
 }
 
 func TestPacket(t *testing.T) {
-	client := &Client{}
+	ctx, cancel := context.WithCancel(context.Background())
+	client := &Client{
+		ctx:    ctx,
+		cancel: cancel,
+	}
 	addr, err := tunnel.NewAddressFromAddr("udp", util.EchoAddr)
 	common.Must(err)
 	conn1, err := client.DialPacket(nil)
diff --git a/tunnel/transport/client.go b/tunnel/transport/client.go
index 7e3f688..0e2edb7 100644
--- a/tunnel/transport/client.go
+++ b/tunnel/transport/client.go
@@ -16,9 +16,12 @@ import (
 type Client struct {
 	serverAddress *tunnel.Address
 	cmd           *exec.Cmd
+	ctx           context.Context
+	cancel        context.CancelFunc
 }
 
 func (c *Client) Close() error {
+	c.cancel()
 	if c.cmd != nil {
 		c.cmd.Process.Kill()
 	}
@@ -31,7 +34,8 @@ func (c *Client) DialPacket(tunnel.Tunnel) (tunnel.PacketConn, error) {
 
 // DialConn implements tunnel.Client. It will ignore the params and directly dial to the remote server
 func (c *Client) DialConn(*tunnel.Address, tunnel.Tunnel) (tunnel.Conn, error) {
-	conn, err := net.Dial("tcp", c.serverAddress.String())
+	dialer := new(net.Dialer)
+	conn, err := dialer.DialContext(c.ctx, "tcp", c.serverAddress.String())
 	if err != nil {
 		return nil, common.NewError("transport failed to connect to remote server")
 	}
@@ -41,9 +45,11 @@ func (c *Client) DialConn(*tunnel.Address, tunnel.Tunnel) (tunnel.Conn, error) {
 }
 
 // NewClient creates a transport layer client
-func NewClient(ctx context.Context, c tunnel.Client) (*Client, error) {
+func NewClient(ctx context.Context, _ tunnel.Client) (*Client, error) {
 	cfg := config.FromContext(ctx, Name).(*Config)
 
+	ctx, cancel := context.WithCancel(ctx)
+
 	var cmd *exec.Cmd
 	serverAddress := tunnel.NewAddressFromHostPort("tcp", cfg.RemoteHost, cfg.RemotePort)
 
@@ -87,6 +93,8 @@ func NewClient(ctx context.Context, c tunnel.Client) (*Client, error) {
 	client := &Client{
 		serverAddress: serverAddress,
 		cmd:           cmd,
+		ctx:           ctx,
+		cancel:        cancel,
 	}
 	return client, nil
 }
diff --git a/version/version.go b/version/version.go
index 9232fb9..51bcbab 100644
--- a/version/version.go
+++ b/version/version.go
@@ -15,7 +15,7 @@ type versionOption struct {
 }
 
 func (*versionOption) Name() string {
-	return "help"
+	return "version"
 }
 
 func (*versionOption) Priority() int {